Key-cutting machine.



0. M. ENGELBERT.

KEY CUTTINGMACHINE.

APPLICATION man ocT. 20, 1911.

L5mf Patented Apr. 13, 1915.

0. M. ENGELBEHT.

KEY CUTTING APPLICATION .flLED 0 MACHiNE.

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knie-cuirs" to ivraorrrne.

.Application flied October fait), 19T.

i710 au whom @'25 may concern.

lle 1t known that ll, @sono lla/l. ldnonminu'r., a citizen of the United States, and resldent 'of New York city, borough of Brooklyn, in

'removed .and replaced/for examining the key while it is in set position onsuch mem-4 ber, andwherein one cutter will suilice for cutting all styles of cylinder keys.

My invention comprises novel details of improvement and combinations of parts that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be' had to the accompanying drawings forming part hereof, wherein,

Figure l is a plan,view-ol2 a key cutting machine embodying` iiiy invention; Fig. 2 is a partly broken end view thereof; Fig. 3 is a front view of -the machine; Fig. 4 is a section on the line 4, fl, in Fig. l, and Fig. 5- is a section on the line 5, 5, in Fig. l.`

Similar numerals of reference indicate corresponding parts in the several views.

Upon a suitable base l spa-ccd parallel bars2 are suitably mounted` to slide in suitable guides carried by saifd base. Screws 3a on guides f'l serve to guidcthe' bars 2.

At -lareadgiusting screws alined with the ends of bars 2 and shown carried by lugs 5 on base l, whereby the movement of bars 2 toward cutter (3 may be regulated as desired.

he `cutter (i is shown havingteeth 6*I upon opposite sides tapering to its periphery and forming an acute angle at the cutting edges adapted for cutting a key blank at one or both sides of the cutter as the latter rotates. To the bars 2, above base l., is suitably secured a carriage member or plate 7,'which may have movement toward and from cutter G, being guided by bars Carriage member 7 may be secured to bars 2 by screws 8. lUpon carriage member or. plate are. bars or guides 9, disposed atright angles to bars 2, which bars or gni-des El Specicaton of Letters latent.

bars 9. A screw l2 mounted Seriell No. 555,782,

may be secured 'upon meub" l0. Upon bars 9 the upper c or plate .ll is mounted to s with respect to cutter 6, tlv member ll being shown grooves llslidably receiv Y by screws age member ,ransversely under side of ovided Witli the guiding to rotate upon carriage member 7 meshes with threads or a nut 13 provided on plate or member ll, whereby the latter may be fed transversely with respect to the plane ol cutter G as required. Plate or member ll is provided with a handle 14el for manually moving the carriage towardy and from the cutter. Means .are provided upon member l1 for holding the pattern or master key 15 and .the key blank 1C, the latter beingmaintained `in position to be operated upon by cutter 6.

For this purpose l have shown clamping plates 17, 1S, upon member ll, and adjustably held by screws 19,20, respectively passing through apertures in clamping plates l?, 1S,- and entering threaded holes in member ll. The clamping plates i7, 18, at their rearward edges, have depending flanges or lugs 17a, 18, adapted to enter corresponding recesses 2l, in member il. to retain the clamping plates 17, 18 in proper.alinementl Member ll, under the forward edge portion of plates 17, 18, is shown provided with recesses ll", ll, to receive a rib that may be upon a key when the key vis clamped tween the parts 1l and 17 or 18. At 22 is a guiding linger carried by base l. and projecting toward master or pat-tern key l5, to coact with the latter in causing guiding movements of the' carriage when the key blank lo is to be cut. The end 22 of finger 22 is shown tapered to enter the notches in key l5. I

The cutterv 6 is shown carried by a shaft 23 having a.,pul ley and journaledin an. oscillatory bearing member or bracket 25.4

The member or bracket 25 is pivotally mounted upon base l to rock toward and from the carriage. For this purpose l have shown screws 26 carried by base l pivotally supporting the horizontally disposed part A spring 8l interposed betweenstandard llt) g mesme 30 and the hub 25C of member 25V serves to retain the' parts in .operative relation and causes nut 27 to bear against a dial 32 car- ,ried by standard 30. The nut 27 has a vithin thousandthspf an inch, which will beound important since keys for cylinder locks are customarily made very accurate. In order to hold the cutter firmly in adjusted position, I provide a bar 33, shown secured at one end upon member 25, .as by screw 3-1, and adjacent the other end pro vided with a slot 33 disposed over 'standard 30 and-receiving a screw 35 entering a threaded hole in said standard, whereby the bearing 25 may be firmly locked to stand ard 30 after desired adjustment of cutter 6 has been made.

In accordance with my invention the pattern or master key 15 is secured in position upon the carriage in operative position With respect to guiding or regulating nger 22,

and the key blank 16 is secured in proper position upon the carriage opposite cutter 6. The carriage member 11 is then, by means. of screw 12, adjusted to bring key 15 into proper position with respect to finger 22; the carriage is then pushed forwardly to bring said key into contact With th adjacent edge of said finger; the carriage members are then maintained under forward tension by manual push upon handle 14 so that the key 15 is kept in contact with finger 22 which brings the key blank 16 into con tact with the rotating cutter 6, and then as the work proceeds the screw 12 is rotated tocause carriage member 11 to move transversely with respect to the plane of the -cutter (as from the top to the bottom in Fig. y1), and as key 15 thus travels in and out Aaccording to its cuts or teeth, in contact with finger 22, the carriage members 7 and 11 will be moved correspondingly and thereby the key blank 16 will be moved in Contact with cutter 6 in accordance with the shape of the notches or teeth of key 15, the operator by properly bearing upon handle 14- permitting the carriage members to move in the directions required while maintaining the key blank in operating cutting relation -to the cutter, the cutter at its side or sides cutting the teeth in the keyblank as the work proceeds.

By the means described the machine is adapted to cut any key for a cylinder lock the top of carriage member 11, the latter may be readily removed and replaced.

By means of my improvements a cutter having the same shape as'the teeth or cuts in the key is not required, since the cutter 6 will cut all shapes of teeth in the key blank.

Changes may be made in the details of construction and arrangements s'et forth, within the scopeotI the appended claims, without departing from the spirit of my invention.

Having now described my invention what I claim is 1. The combination of a base, a cutter rotatively mounted thereon, means for feeding a` key toward and from the cutter and transversely to the plane of the latter, a bearing supporting the cutter and movably carried by the base, a threaded rod extending from said bearing, a standard receiving said rod, a nut upon the rod, and a spring coacting with the bearing and the standard.

2. The combination of a base, a cutter rotatively `mounted thereon, means for feeding a key toward and from the cutter and trans versely to the plane of the latter, a bearing supporting the cutter and movably carried by the base, a threaded rod extending from said bearing, a standard receiving said rod, a nut upon the rod, a spring coacting with the bearing and the standard, abar secured to the bearing and having a slot, said bar extending over the standard, and a screw carried by the standard and passing through said slot to rigidly hold the bearing in set position.

Signed at New York city, in the county of New York, and State of New York, this j IVitnesses: CHAs. A. BnoDcN, T. F. BOURNE. 

